1 definition
by
Cacker Spotter

Dorset/Hampshire word for pikey.
Thorney Hill in Bransgore - Christchurch is full off cackers - mostly pikeys who have abandoned their caravans for council houses.
Not the same as a chav - Cackers will be from gypsy stock.

Here Dave have you seen all those caravans on the recreation ground? - Yeah they are Cackers.